API reference / Prediction markets (on-chain)

Prediction markets (on-chain)

Our own Polymarket indexer over the public Polygon ledger: implied probabilities, VWAP, and USD volume decoded from CTF Exchange V2 fill events — no Polymarket API. Daily history accumulates in the archive (feed polymarket.probs).

2 endpoints. Pay per call in USDC via x402 with no account, or get unlimited calls for $99/mo. Every response is shaped { ticker, data, source, as_of }.

GET/api/v1/prediction-markets$0.03

Most-active Polymarket outcome tokens: implied probability, VWAP, volume

Use to see where prediction-market money is flowing: the most recently traded Polymarket outcome tokens with implied probability (last on-chain price), today's VWAP and USD volume, and indexed totals — decoded by our own indexer from CTF Exchange V2 events on the public Polygon ledger, not from any Polymarket API. `?limit=` up to 100.

Example request
GET /api/v1/prediction-markets

Example response coming soon — call the endpoint to see the live shape, or check /openapi.json.

GET/api/v1/prediction-markets/{id}$0.02

One Polymarket outcome token: probability, volume, on-chain identity

Use to track one Polymarket outcome token by its uint256 decimal token id: implied probability, today's VWAP and USD volume, indexed totals, plus on-chain identity (condition id, question title, neg-risk flag) resolved from the market's preparation transaction on Polygon. List active token ids via /prediction-markets.

Example request
GET /api/v1/prediction-markets/ID

Example response coming soon — call the endpoint to see the live shape, or check /openapi.json.